<script>
import {defineComponent} from 'vue'

export default defineComponent({
    name: "Child",
})
</script>

<template>
    <div>
        <h3>Child</h3>
        <button @click="$bus.$emit('one',1,2,3,4)">触发one</button>
    </div>
</template>

<style scoped>

</style>